Process for producing carbon fibers having excellent...

Details Process for producing carbon fibers having excellent... Process for producing carbon fibers having excellent...

C - Chemistry, Metallurgy

01

B

18/9

C01B 31/02 (2006.01) D01F 9/22 (2006.01) D01F 11/00 (2006.01)

Patent

CA 1040370

Abstract carbon fibers having excellent physical properties, very high tensile strengths and high moduli of elasticity are prepared from acrylonitrile copolymer fibers, produced by copolymerizing at least 80 mol % acrylonitrile with an unsaturated monomer containing a carboxyl group in which 0.1 to 15% of the terminal hydrogens have been replaced with an alkali metal cation or ammonium ion, by heating said fibers in a first thermal stabilization stage, further heating said fibers in a second, carbonizing stage and, if desired, further heating said fibers in a third, graphitizing stage.

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